What type of fire is primarily defined by the involvement of petroleum products?

The correct answer is associated with fires that involve flammable liquids, particularly petroleum products, which are the main contributors to this type of fire. Class B fires encompass materials such as gasoline, oil, grease, and other combustible liquids. Understanding this classification is critical for effective fire response and safety protocols, as Class B fires require specific extinguishing agents, such as foam, dry chemical, or carbon dioxide, to safely suppress the flames.

In contrast, Class A fires involve ordinary combustible materials like wood, paper, and cloth; Class C fires are electrical in nature and involve energized electrical equipment; and Class D fires are related to combustible metals such as magnesium and sodium, which require unique handling procedures due to their reactive properties. Knowing these classifications ensures proper fire safety measures and responses in various scenarios.